CN102464971B - Dust-inhibiting and fire-retarding covering agent for coal, and preparation method thereof - Google Patents
Dust-inhibiting and fire-retarding covering agent for coal, and preparation method thereof Download PDFInfo
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- CN102464971B CN102464971B CN 201010537096 CN201010537096A CN102464971B CN 102464971 B CN102464971 B CN 102464971B CN 201010537096 CN201010537096 CN 201010537096 CN 201010537096 A CN201010537096 A CN 201010537096A CN 102464971 B CN102464971 B CN 102464971B
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Abstract
The invention discloses a novel dust-inhibiting and fire-retarding covering agent for coal, and a preparation method thereof. The dust-inhibiting and fire-retarding covering agent comprises components of, by mass: 4-5% of a film forming agent, 10-12% of a curing agent, 2-3% of a film forming auxiliary agent, 1-3% of a penetrant, 1-3% of a fire retardant, and 74-82% of water. The preparation method of the dust-inhibiting and fire-retarding covering agent comprises steps that: the film forming agent is added and dissolved in water under a certain temperature; the temperature is controlled; the solution is continuously stirred, and the curing agent, the film forming auxiliary agent, the penetrant, and the fire retardant are orderly added to the solution while stirring; the mixture is stirred, until a reaction is sufficiently carried out. The novel dust-inhibiting and fire-retarding covering agent is sprayed onto the surface of coal under a normal temperature, and other equipments and conditions are not required. Within a short time, a flexible and compact continuous high-molecular covering membrane is formed, such that phenomena of dust emission and spontaneous combustion during transportation and stacking processes can be avoided. Therefore, coal economic loss and environmental pollution can be effectively reduced; and great economic benefits and social benefits of environmental protection are provided.
Description
Technical field
The present invention relates to fire-retardant insulating covering agent of a kind of novel coal dust suppression and preparation method thereof.
Background technology
Coal, in the process of piling up and transporting, can raise pit ash because of oxygenizement, and fixed carbon and calorific value descend, and reduce the quality of coal.Spontaneous combustion of coal also can cause a large amount of coals to burn in vain.As the bituminous coal of Shantou Power Plant burning, the positive usual amounts of the frequent contain of coal yard more than 3 months, because spontaneous combustion often occurs storage coal overlong time, spontaneous combustion occurs in simultaneously several places sometimes.The coal glowed is sent to be carried and grinding plant, can cause burning and explosion hazard.Coal spontaneous combustion is great hidden danger, has also reduced the economic worth of coal, and the spontaneous combustion of coal simultaneously will be emitted a large amount of SO
2, CO
2, NO
x, H
2the obnoxious flavour such as S and CO and a large amount of flue dust, organism in coal also can generate the toxic substances such as a certain amount of benzo Bi in oxidation decomposition course, these gases, by pollutant atmosphere, cause harm in various degree to HUMAN HEALTH, animal and plant growth, water body and edatope.Therefore, prevent that the coal spontaneous combustion tool is of great significance.
In addition, in the coal in China railway transport course without any the covering measure, energy group company of the Chinese Shenhua fortune coal of take is example, institute of Shenhua Group company producing coal charcoal mainly relies on transportation by railroad, fortune coal fire car transports in the way, PORT OF HUANGHUA and needs by more than 100 tunnels, the longest tunnel surpasses 10km, in view of coal loss in railway transport course serious, the annual Shenhua Group company that gives causes the tremendous economic loss, coal powder airborne dust in tunnel while particularly transporting coal fire car process of passing through tunnel, unrestrained gathering, Dust Concentration in tunnel reaches very high level, have a strong impact on the safe operation of the equipment such as electric power signal in hole, caused serious potential safety hazard, on the other hand, the tunnel domestic demand is wanted labor cleaning's coal dust, affects transportation safety, Coal Transport can cause serious pollution caused by coal dust along the railway simultaneously.In the 100m scope along the line of unit train process, the effect that kicked up by coal dust, overall suspended pellet (TSP) concentration significantly increases, and the instantaneous concentration that 50m place, railway both sides occurs often surpasses atmosphere quality grade III Standard 1.50mg/m
3, Coal Transport causes serious environmental pollution along the railway.
In prior art, process self-ignition of coal pile and mainly use the method for sprinkling irrigation water.Water directly is sprinkled upon on the dump surface, or the method for ditching pouring all can make to infiltrate the water yield inequality in dump, and easily run off, coal is washed away, owing to being subject to hot pressing function, the water yield that enters the spontaneous combustion position is few, and flameproof effect is bad.
Airborne dust and Coal Loss problem that wind erosion for solution coal in the process of piling up and transporting and water erosion cause, the simplest method of prior art is at the coal surface sprinkling, makes coal surface crust, minimizing airborne dust, but this method weak effect.For addressing this problem, prior art discloses a series of coal dust Fugitive dust inhibiting agents.As:
The water-soluble material that the disclosed Coal Dust Pollution inhibitor of Chinese invention patent 200710158471.5 is comprised of multiple compounds, each component is: take benzene emulsion or vinyl acetate emulsion as main film-forming resin: 15%-20%, take polyvinyl alcohol or polyvinyl formal or polyacrylamide as auxiliary membrane-forming agent: 25%-30%, take Natvosol as thickening material: 1%-2%, take Sodium hexametaphosphate 99 as dispersion agent: 15%-20%, take sodium pentachlorophenate as Antisepticize and mildew preventive: 2%-3%, take atlapulgite as anti-settling agent: 1%-2%, take tributyl phosphate as defoamer: 2%, and titanium dioxide: 15%-20%, mill base 3%-5%.
Chinese invention patent 200810212291.5 discloses a kind of railway transportation dust suppressant, for overcoming the problems such as the prior art cost is high, anti-dust effect is poor, invent, it consists of: synthetic polymer 2%-7%, modified-cellulose class water-soluble polymers 0.1%-5%, water 85%-95%, copper sulfate 0%-2%.Wherein, above-mentioned synthetic polymer is at least by two kinds of composite forming of water-soluble polymers.
The disclosed a kind of coal dust depressor of Chinese invention patent 200910265220.6, be comprised of sodium lignosulfonate 20%-30%, vinylformic acid 12%-18%, hydrogen peroxide 0.4%-0.6%, calcium chloride 5%, sodium tetraborate 0.5%, sodium methyl silicate 3% and water 42%-59%.
The problem that prior art exists is spontaneous combustion and the airborne dust problem that can't simultaneously solve in Coal Transport and stacking process.
Summary of the invention
In order to solve the problems of the technologies described above, the invention provides fire-retardant insulating covering agent of a kind of novel coal dust suppression and preparation method thereof, reach effectively dust suppression, can prevent and treat again the double effects of coal dust spontaneous combustion.
Its technical solution is:
The fire-retardant insulating covering agent of a kind of novel coal dust suppression, the fire-retardant insulating covering agent of this dust suppression is composed of the following components by mass percentage:
Membrane-forming agent 4%～5%
Solidifying agent 10%～12%
Film coalescence aid 2%～3%
Permeate agent 1%～3%
Fire retardant 1%～3%
Water 74%～82%
Above-mentioned membrane-forming agent is polyvinyl alcohol, and solidifying agent is ethanol, and film coalescence aid is propylene glycol, and permeate agent is fatty alcohol-polyoxyethylene ether (JFC).
Above-mentioned fire retardant is comprised of primary ammonium phosphate and tetramethylolmethane; Wherein, the weight ratio of each component is: primary ammonium phosphate: tetramethylolmethane=3: 1.
The preparation method of the fire-retardant insulating covering agent of a kind of novel coal dust suppression comprises the following steps:
At a certain temperature membrane-forming agent is added to the water to dissolving, temperature control, and add successively solidifying agent, film coalescence aid, permeate agent and fire retardant under continuously stirring, continue to be stirred to and react completely.
The solvent temperature of above-mentioned membrane-forming agent is 70～85 ℃.
Above-mentioned control temperature is 50～65 ℃.
Useful technique effect of the present invention is:
The fire-retardant insulating covering agent of novel coal dust suppression of the present invention is sprayed at normal temperatures the coal surface and gets final product, without other equipment and condition, can form pliable and tough, the fine and close continuity polymer mulch film of one deck within a short period of time on the surface of coal, this film has stronger wind resistance, the anti-ability drenched with rain, and can effectively prevent and treat the coal airborne dust.Simultaneously this polymeric membrane has excellent air barrier performance, thereby contacting of blocking oxygen and coal prevents coal spontaneous combustion.Contain fire retardant in mulch film in addition, can be through to catch and the effects such as flame medium chain reactive behavior material radical OH, O by becoming charcoal effect heat absorption to reduce temperature of combustion or producing the radical-scavenging composition in ignition process, its concentration is reduced, thereby slow down or stop the chain reaction of coal combustion, reach fire-retardant purpose.Thereby avoided airborne dust and the dieseling of coal in transportation and stacking process, effectively reduced Coal Economy loss and environmental pollution, huge economic benefit and the social benefit of environment protection have been arranged.In addition, the fire-retardant insulating covering agent of novel coal dust suppression of the present invention is nontoxic, tasteless, with low cost, convenient for production.
Embodiment
Embodiment 1
Taking the 4g polyvinyl alcohol is dissolved in 30ml distilled water, heat and stir more than 0.5 hour in the water-bath that to be positioned over temperature be 70 ℃, until solution, become colorless when transparent, the temperature of water-bath is adjusted into to 50 ℃, then under agitation slowly drip successively 10ml ethanolic soln and 2ml propylene glycol, continue to stir, and under agitation slowly drip the 1ml osmotic agent solution, continue under agitation slowly to add successively primary ammonium phosphate 0.75g and tetramethylolmethane 0.25g, stir after 0.5 hour, constant volume in the 100ml volumetric flask, can make the fire-retardant insulating covering agent of novel coal dust suppression.
Embodiment 2
Taking the 4.5g polyvinyl alcohol is dissolved in 35ml distilled water, heat and stir more than 0.5 hour in the water-bath that to be positioned over temperature be 70 ℃, until solution, become colorless when transparent, the temperature of water-bath is adjusted into to 50 ℃, then under agitation slowly drip successively 11ml ethanolic soln and 2.5ml propylene glycol, continue to stir, and under agitation slowly drip the 2ml osmotic agent solution, continue under agitation slowly to add successively primary ammonium phosphate 1.5g and tetramethylolmethane 0.5g, stir after 0.5 hour, constant volume in the 100ml volumetric flask, can make the fire-retardant insulating covering agent of novel coal dust suppression.
Embodiment 3
Taking the 5g polyvinyl alcohol is dissolved in 40ml distilled water, heat and stir more than 0.5 hour in the water-bath that to be positioned over temperature be 70 ℃, until solution, become colorless when transparent, the temperature of water-bath is adjusted into to 50 ℃, then under agitation slowly drip successively 12ml ethanolic soln and 3ml propylene glycol, continue to stir, and under agitation slowly drip the 3ml osmotic agent solution, continue under agitation slowly to add successively primary ammonium phosphate 2.25g and tetramethylolmethane 0.75g, stir after 0.5 hour, constant volume in the 100ml volumetric flask, can make the fire-retardant insulating covering agent of novel coal dust suppression.
Claims (5)
1. the fire-retardant insulating covering agent of novel coal dust suppression, the fire-retardant insulating covering agent of this dust suppression is composed of the following components by mass percentage:
Described membrane-forming agent is polyvinyl alcohol;
Described solidifying agent is ethanol;
Described fire retardant is comprised of primary ammonium phosphate and tetramethylolmethane; Wherein, the weight ratio of each component is: primary ammonium phosphate: tetramethylolmethane=3: 1;
Described film coalescence aid is propylene glycol.
2. the fire-retardant insulating covering agent of a kind of novel coal dust suppression according to claim 1, it is characterized in that: described permeate agent is fatty alcohol-polyoxyethylene ether JFC.
3. the method for preparing the fire-retardant insulating covering agent of coal dust suppression claimed in claim 1, it is characterized in that the method comprises the following steps: at a certain temperature membrane-forming agent is added to the water to dissolving, temperature control, and add successively solidifying agent, film coalescence aid, permeate agent and fire retardant under continuously stirring, continue to be stirred to and react completely.
4. the method for preparing the fire-retardant insulating covering agent of coal dust suppression according to claim 3, it is characterized in that: the solvent temperature of described membrane-forming agent is 70～85 ℃.
5. the method for preparing the fire-retardant insulating covering agent of coal dust suppression according to claim 3, it is characterized in that: described control temperature is 50～65 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010537096 CN102464971B (en) | 2010-11-02 | 2010-11-02 | Dust-inhibiting and fire-retarding covering agent for coal, and preparation method thereof |
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|---|---|---|---|
| CN 201010537096 CN102464971B (en) | 2010-11-02 | 2010-11-02 | Dust-inhibiting and fire-retarding covering agent for coal, and preparation method thereof |
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| Publication Number | Publication Date |
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| CN102464971A CN102464971A (en) | 2012-05-23 |
| CN102464971B true CN102464971B (en) | 2013-12-25 |
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| CN 201010537096 Expired - Fee Related CN102464971B (en) | 2010-11-02 | 2010-11-02 | Dust-inhibiting and fire-retarding covering agent for coal, and preparation method thereof |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102336994B (en) * | 2011-06-30 | 2013-07-24 | 中国神华能源股份有限公司 | Polyvinyl alcohol foam oxygen insulation material and preparation method and application thereof |
| CN104164271B (en) * | 2014-09-02 | 2015-05-20 | 北京铱金惠通能源控股有限公司 | Flame retardant capable of preventing coal from spontaneous combustion and preparation method thereof |
| CN108559514B (en) * | 2018-01-08 | 2020-12-15 | 东莞市粤惠建筑工程技术咨询有限公司 | Rock soil solidifying agent and preparation process and application thereof |
| CN108721804A (en) * | 2018-04-09 | 2018-11-02 | 夏侯文奇 | A kind of medicament extending the coal ignition phase for easily spontaneous combustion coal dump |
| CN110157379B (en) * | 2019-06-21 | 2022-04-26 | 陕西科技大学 | Soft film type coal flame-retardant dust suppressant and preparation method thereof |
| CN111995984A (en) * | 2019-10-23 | 2020-11-27 | 任丘市诚亿化工有限公司 | High-concentration antifreezing liquid coal dust suppressant |
| CN113717403B (en) * | 2021-08-20 | 2023-12-26 | 山东科技大学 | Multifunctional gel for inhibiting dust emission of coal pile and preventing spontaneous combustion and preparation method thereof |
| CN115678354A (en) * | 2022-11-22 | 2023-02-03 | 南方电网电力科技股份有限公司 | High-volatile raw coal flame retardant and preparation method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1570013A (en) * | 2004-04-30 | 2005-01-26 | 北京科技大学 | Dust suppression fire retardant |
| CN1854239A (en) * | 2005-04-21 | 2006-11-01 | 上海久安水质稳定剂厂 | Dust-coating inhibitor |
| CN101560375A (en) * | 2008-04-17 | 2009-10-21 | 宝山钢铁股份有限公司 | Agglutinant for preventing powdered ore from flying |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5853679B2 (en) * | 1980-03-25 | 1983-11-30 | 花王株式会社 | Method for preventing spontaneous combustion of piled coal |
| US7482385B2 (en) * | 2002-12-20 | 2009-01-27 | Envirospecialists, Inc. | Wetting agent formulations for hydrotropic moisture control of substrates and dispersed phases |
| US7682519B2 (en) * | 2003-05-16 | 2010-03-23 | The United States Of America As Represented By The Secretary Of The Navy | Formulation for dust abatement and prevention of erosion |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1570013A (en) * | 2004-04-30 | 2005-01-26 | 北京科技大学 | Dust suppression fire retardant |
| CN1854239A (en) * | 2005-04-21 | 2006-11-01 | 上海久安水质稳定剂厂 | Dust-coating inhibitor |
| CN101560375A (en) * | 2008-04-17 | 2009-10-21 | 宝山钢铁股份有限公司 | Agglutinant for preventing powdered ore from flying |
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